JP2542265Y2 - Ice greenhouse structure of frozen car - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice greenhouse structure of a freezer truck for transporting frozen and refrigerated cargo in a freezer.

[0002]

2. Description of the Related Art With the development of a high-precision temperature control vehicle for a refrigeration vehicle, cooling of an ice greenhouse by indirect cooling has been required in order to prevent a change in product temperature due to direct blowing of cold air from a conventional refrigerator. This is because when transporting fresh fish, vegetables, fruits, and the like, there is an optimum cooling temperature of the product itself, and it is an issue how to keep this temperature constant.

For this purpose, Japanese Utility Model Laid-Open No. 2-100848 discloses a machine room provided at a front end of a storage room via a partition wall, and the partition wall is provided by a variable speed fan provided in the machine room. Air is sucked into the storage chamber from the suction port opened near the upper part of the storage chamber, mixed with air cooled by the cooling unit arranged at the upper part of the storage chamber, and the mixed air is formed into a ventilation duct formed on the floor of the storage chamber. Is disclosed.

[0004]

However, in the above cited reference, not only the structure is complicated due to the use of the variable speed fan, but also the air flow in the vehicle width direction of the ventilation duct (hereinafter referred to as the "cool air passage") becomes possible. Since the cool air is not evenly distributed in the cool air passages in front of the variable speed fan and becomes small near both ends, the temperature distribution of the air in the storage room is not uniform, and the temperature change of the loaded cargo becomes large. There was a point.

Accordingly, an object of the present invention is to provide an ice greenhouse structure of a freezing car that achieves a uniform internal temperature by achieving a uniform distribution of cool air with a simple structure.

[0006]

SUMMARY OF THE INVENTION However, the present invention
An ice temperature chamber defined by a heat insulating member, a cold air duct provided above the ice temperature chamber, at least two cooling means arranged in series in the cold air duct, and communicating with an outlet of the cold air duct And a plurality of cold air passages communicating with the cool air guide passages and forming a plurality of cold air outlets for blowing cool air into the ice temperature chamber. An excess cold air passage communicating with the cold air passage and reaching and opening near the suction port of the cold air duct;
It is provided with a uniform air distribution means provided on the cold air guiding passage and having a predetermined air resistance.

[0007]

Therefore, in the present invention, when the cool air from at least two cooling means arranged in series in the cool air duct above the ice greenhouse is guided to the cool air guiding passage and passes through the uniform air distribution means, Since the uniform air distribution means has a predetermined air resistance, the air resistance of the portion with a large amount of air passing through the uniform air distribution means increases, and the air resistance of the portion with a small amount of air decreases, so that the amount of air passing therethrough is constant. Thus, the above problem can be achieved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a refrigerator car having only an ice greenhouse, and the configuration of the refrigerator car according to the present invention will be described.
At present, a refrigerating car having both an ice greenhouse (−5 ° C. to 0 ° C.) and a low-temperature freezing room (chilled room) (−20 ° C.) has been developed. .

The refrigerator car 1 is constituted by a freezer 3 behind the cab 2, and a compressor 4 and a freezer 3 which operate in connection with a traveling engine (not shown) below a driver's seat (not shown) of the cab 2. Capacitor 3 provided at the bottom
0, a refrigerating cycle including evaporators 6a and 6b and an expansion valve (not shown) provided above the ice greenhouse 5 formed in the freezer 3; Note that the compressor can be driven electrically by mounting an electric motor irrespective of the traveling engine.

In this refrigeration cycle, the high-temperature and high-pressure refrigerant gas compressed by the compressor 4 releases heat to the air sent by the blower 8 while passing through the condenser 30, liquefies, and changes into a high-pressure liquid refrigerant. This liquid refrigerant becomes a mist-like refrigerant by passing through an expansion valve (not shown), and absorbs the heat of the air sent by the blowers 7a and 7b while passing through the evaporators 6a and 6b, and is vaporized to become a refrigerant gas. To return to the compressor 4.

By this action, the evaporators 6a, 6
Since the heat of the air in the ice greenhouse 5 absorbed by b is released to the outside air from the condenser 30, the inside of the ice greenhouse 5 is cooled.

As shown in FIG. 2, a cold air duct 9 is provided at an upper portion of the ice greenhouse 5, and a first air evaporator 6a and a blower 7a are provided in the cold air duct 9.
Cooling unit 10b composed of a cooling unit 10a, an evaporator 6b and a blower 7b
Are arranged in series.

An outlet 11 of the cool air duct 9 communicates with a cool air guide passage 13 defined by a partition wall 12 on the front side of the ice temperature chamber 5. 3, bulkheads 15 and 16 for connecting and holding the front side wall 14 and the partition wall 12 are provided.

As shown in FIG. 3, for example, the bulkhead 15 has a flange 17 joined to the front side wall 14 of the freezer by rivets, a flange 18 joined to the partition wall 12, and a plurality of bulkheads having a predetermined air resistance. Opening 1
9 is formed by a plate portion 20 on which is formed. In this embodiment, the bulkhead 15
In addition to the above, the uniform air distribution is more efficiently performed by using the bulkhead 16, but the effect can be obtained only by the bulkhead 15. Also, bulkhead 1
6 has a configuration different from that of the bulkhead 15 and has openings 19.
Is performed by the two front and rear openings, but may be the same as that of the bulkhead 15.

The most downstream side of the cool air guide passage 13 is communicated with a cool air passage 21.
A plurality of cold air outlets 22 for blowing cool air into the floor 23 and a plurality of partitions 24 interposed between the bottom plate 25 of the freezer 3 and the floor 23 define a plurality of floors under the floor 23. It will be.

The downstream ends of the plurality of cold air passages 21 are:
The excess cold air passage 27 defined by the rear partition wall 26 communicates with the excess cool air passage 27. The upper end of the excess cool air passage 27 opens near the suction side of the cool air duct 9, and cool air is returned into the cool air duct 9 again. It is leading.

In the ice greenhouse 5, a loading box 28 is mounted on the floor 23 via a vibration preventing member 29 or a caster.
It is installed in.

With the above configuration, the flow of cool air in the ice greenhouse 5 is as shown by the arrow in FIG. Specifically, the air in the ice temperature chamber 5 and the cool air from the surplus cool air passage 27 are sucked into the cool air duct 9 by the operation of the blowers 7a and 7b, and are cooled by passing through the evaporators 6a and 6b. The cooled air (cool air) reaches the cool air guide passage 13 from the cool air duct 9 and passes through the bulkhead 15.

When passing through the opening 19 formed in the bulkhead 15, the passage resistance increases near the center where the amount of cool air is large, and the passage resistance decreases near both sides where the amount of cool air is small. Flows near the both sides, so that the cool air passing through the bulkhead 15 is uniformly distributed in the vehicle width direction.

Similarly, in this embodiment, a bulk head 16 is provided to further equalize the cool air in the vehicle width direction.

The cool air that has passed through the cool air guide passage 13 and is made uniform in the vehicle width direction is sent to the cool air passage 21, and a floor positioned on the upper surface of the cool air passage 21 while passing through the cool air passage 21. The air is blown out from the cold air outlet 22 opened in the section 23 into the ice temperature chamber 5 to cool the ice temperature chamber 5.

The cool air (excess cool air) that has passed through the cool air passage 21 reaches the cool air duct 9 again through the excess cool air passage 27, and is discharged from the cool air outlet 22 by releasing the excess cool air into the excess cool air passage 27. The amount of cold air blown into the ice temperature room 5 can be made uniform, and the ambient temperature in the ice temperature room can be kept constant.

Thus, since the cool air moves so as to wrap the loading box 28, the temperature in the ice temperature chamber 5 can be made uniform.

[0025]

As described above, according to the present invention, uniform cold air in the vehicle width direction can be achieved with a simple structure by arranging a bulk head having a predetermined air resistance on the cold air guiding passage. Thus, the temperature in the ice greenhouse can be made uniform.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a refrigerating vehicle according to an embodiment of the present invention.

FIG. 2A is a cross-sectional view showing a configuration of a freezer according to an embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along line AA of FIG.

3A is a front view of the bulkhead according to the present invention, and FIG. 3B is a cross-sectional view taken along line BB of FIG. 3A.

4A is a cross-sectional view illustrating the flow of air in the ice greenhouse according to the present invention, and FIG. 4B is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Freezer car 3 Freezer 5 Ice greenhouse 6a, 6b Evaporator 7a, 7b Blower 10a, 10b Cooling unit 13 Cold air guide passage 15, 16 Bulkhead (Equal air distribution means) 21 Cold air passage 22 Cold air outlet 27 Extra cold air passage 28 Loading box

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Koji Hosoda 6-26-1, Minamioi, Shinagawa-ku, Tokyo Isuzu Motors, Inc. (72) Inventor Takamitsu Sakai 3034 Jyochi-Uehara, Atsugi-shi, Kanagawa Japan Full-Half Corporation Atsugi factory

Claims (1)

(57) [Scope of request for utility model registration] 1. An ice greenhouse defined by a heat insulating member, a cold air duct provided above the ice greenhouse, at least two cooling means arranged in series in the cold air duct, A plurality of cold air passages communicating with the air outlets for guiding the cool air from the cooling means downward, and a plurality of cold air outlets communicating with the cool air induction passages and forming a plurality of cool air outlets for blowing the cool air into the ice temperature chamber; A passage, an excess cold air passage communicating with the plurality of cold air passages and reaching and opening near the suction port of the cold air duct; and a uniform air distribution means provided on the cold air guiding passage and having a predetermined air resistance. An ice greenhouse structure for a refrigerating car, comprising: